Features: Display the US and TOCO Data with three groups LED display; FHR collection signal for quality indication, alarm indication for abnormal FHR, Fetal movement indication; Coding keyboard adjusts all parameter setting of unit, memory and replay the data in 24 hours（for option）; Record FHR, UC, FM mark, necessary character interpretation and monitoring time synchronously with 832 thermal linear array printer; Curve printing speed, line of thin or thick, signal collection rate can be adjust for the requirements of user, the printing speed can be setup to 1,2,3cm/min;   Adjust the upper and lower alarming limit, real time, date and other parameter, the set-up data can be saved automatically after powered off; The monitoring data can be conveyed to the exterior computer by RS-232.   Specifications: FHR Probe: 9 crystals, wide wave beam Working mode: Pulsed Doppler Ultrasonic frequency: 1.0MHz±10% Signal processing: signal processing units for special digital signal FHR range: 50--240bpm Alarm range:Up: 55--240bpm   Low: 50--235bpm Printing resolution: 27bpm/cm The highest frequency output: ≤5W TOCO: Display range: 0-99units ((nonlinear error ≤±10%) Printing resolution: 40units/cm Display: display US for twin with two groups and TOCO data with one group LED display Battery: 16.8V/1800mA NI-MH rechargeable batteries group Time of continue working in static condition: ≥2 hours Power supply: AV 100--240V 50Hz/60Hz   DC 24V±1V Consume power: ≤50W Working Temperature: 10--40℃     Humidity: ≤80% Atmospheric pressure: 86--106kPa